Yes the oxide reduction process works well. It also in improved upon if you bake after drill. To test this theory Just drill a few panels with a solid oxide core. Bake half then etch off the outside copper, You will see a significant difference. Another popular approach being used in double treated and resin coated foil which does not require a black oxide. Ed Cosper -----Original Message----- From: [log in to unmask] <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Date: Thursday, May 06, 1999 1:24 PM Subject: [TN] Black oxide process >In producing multilayer PCB's, there is an oxide process used to prevent pink >ring. Usually this process is called the "black oxide process" and requires use >of a reducer solution containing an amine borane. > >Is this process considered a standard in the PCB industry and is it's use >increasing? > >Are there alternative processes which accomplish the same objective? > >What is the future trend to eliminate pink ring? > >################################################################ >TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c >################################################################ >To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: >To subscribe: SUBSCRIBE TechNet <your full name> >To unsubscribe: SIGNOFF TechNet >################################################################ >Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. >For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 >################################################################ > > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################